Piston-ring peener



Dec; "16,1930. J. SHAW PISTON RING PEENER Filed March 23, 1928 I m II el u I i z- INVENTOR (fl M88 av 'Q xguAA';

- ATTORNEY Patented Dec. 16, 1930 UNITED STATES PATENT ounce Jams SHAW,or 1.00:, GALIFoBNIA, AssIeNoR or oNn -rnmn are c. x. 0mm AND F. 1:.0mm, Born or BROOKLYN, NEW Your PISTON-RING PEENER Application filedMarch 23, 1928. Serial No. 264,213.

This invention relates to devices for peening piston rings such as areused in as engines and the like; my principal ob ect eing to provide amachine for this purpose by means of which the inner peripheries ofpiston rings of any diameter may be evenly and quickly peened, and inwhich adjustments may be easily made to enable rings of different widthsto be handled, to alter the pressure exerted on the ring by the peeningimplement, and to alter the length of the are on the ring which isengaged by the peener.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which will be exceedingly effective for the purposefor which it is designed. 7

These objects I accomplish by means of such structure and relativearrangements of parts as will fully appear by a perusal of the followingspecification and claims.

In the drawings similar characters of reference indicate correspondingparts in the several views Fig. 1 is a sectional elevation of myimproved peening machine.

Fig. 2 is a fragmentary sectional plan taken on the line 2-2 of Fig. 1.

Fig. 3 is a similar view taken on the line 33 of Fig. 1.

Referring now more particularly to the characters of reference on thedrawings, the numeral 1 denotes a base and frame structureof suitablesize andfrom which is provided as an integral feature with an upperhorizontal table elements 2. Journaled in this structure is a verticalshaft 3 which is driven intermediate its ends from a horizontal driveshaft 4 by worm gearing 5 between the shafts. On the upper end of theshaft is removably secured a peening disk 6 of suitable character, thelower surface of which is flush with the table and overhangs the innerend of the same. Disposed beyond said end of the table in longitudinalalinement with and normall parallel to the shaft 3 is another shaft 7,which is driven adjacent its lower end from the shaft 3 by reductiongear ing 8. The lower end of said shaft is supported by a single bearingball 9, WlllCh permits of swivel or rocking movement of the shown at 'A,both portions, however, being concentric with the shaft. Theportion A isadapted to engage a roller 11 whichis turnably mounted in a slide block12 supported in a socket or guide member 13 mounted above thetable anddisc 6. An adjustable screw 14 bears against the inner end of this blockto enable the same to be moved toward orfrom the cam. Below the cam theshaft 7. is turnable and slidable in a transverse cylindrical swivelbearing member 15 which is mounted in a horizontal slide block 16. Thisblock is guided for horizontal movement radially of and to and from thepeening disc by guides l7brpounted on the frame structure beyond the ta.e.

Between the shafts 7 and 3 and longitudinally alined therewith the block16 carries a circumferentially grooved roller 18, the roller projectingslightly from the adjacent end of the block and the groove beinghorizontally alined with the peening disc. Mounted in the block 16 onthe opposite side of the shaft 7 is a heavy composition spring 19. Thisspring bears at its inner end against the block and at its outer endagainst a slide 20 which is held in any desired position by a hand adjustment screw 21 mounted on the frame struc-' ture, and by means ofwhich the spring may be compressed as desired. The block 16 is notsupported by the guides 17, but by the screw 21 at one end, and by aroller R at the other. i 1

In operation it will be seen that with the rotation of the drive shaft4,the shafts 3 and 7 will be likewise rotated." The cam 10 on the shaft 7engaging the roller 11, causes said shaft to be alternately swung to andfrom the shaft 3 against the resistance offered by the spring 19; andthe rollerv 18 likewise of course moves to and from the disc 6. If noring is disposed between the peening disc and the roller 18, the camwill remain constantly engaged with the roller 11.

If, however, a piston ring 22 is in place to be peened so that its innerperiphery will be engaged by the peening disc and its adjacent outersurface is disposed toward the roller 18, then the cam will be separatedfrom the roller 11 when the enlarged portion A thereof leaves saidroller as shown in Fi 1. The pressure of the spring 19 is then ree toact without restraint to press the roller 18 firmly against the ring,and the latter into pressing engagement with the peening disc. With therotation of the shaft 3, therefore, the ring will be turned horizontallyby the rotative effect imparted by said peening disc, which at the sametime peens the surface engaged thereby. The circumferential extent ofengagement of the peening disc with the ring depends upon thecircumferential extent of the relatively small portion of the cam 10,the relative speed of rotation of the shafts 3 and 7 and the size of thepeening disc; since as soon as the large cam portion A engages theroller 11, the shaft 7 7 and parts connected therewith will move awayfrom the ring and the latter will be released from pressing engagementwith the peener. I i

The spacin between the roller 18 and the peening disc is then suflicientto enable the ring to be readily withdrawn and another one placed inposition, the speed of the shaft 7 being slow enough to enable this tobe easily done before the enlarged portion A of the cam clears theroller 11 and allows the spring 19 to again press the roller 18 towardsthe peener. The roller 18 being grooved and the ring entering saidgroove, the ring cannot ssibly shift vertically while being acted on ythe peening disc. The pressure holding the ring engaged with the peener,and consequently the peening action, is regulated by the adjustment ofthe spring 19 as will be evident. 1

Adjustment of the block 12 to or from the cam enables the spacingbetween the roller 11 and the peener to be altered so as to accommodatethe machine to rings of clifferent widths, while insuring ample spacebetween theroller 18 and the peener being had for the removal of thering when said roller moves away from the peener.

The use of the single ball support for the lower end of the shaft 7permits of the necessary swivel movement of said shaft without strain.The gearing between said shaft and the shaft 3 being at the lower endof-the shaft 7, permits such swivel movement to take place withoutunmeshing the gears, since the shaft movement at this point is veryslight as will be obvious.

The member 18 is supported from the main frame structure by sideextensions 13a which are disposed sufficiently far apart so that ringsof practically any size may be supported on the table and worked on bythe peening disc without interference with such extensions.

From the foregoing description it will be readily seen that I haveproduced such a device as substantially fulfills the objects of theinvention as set forth herein.

l/Vhile this specification sets forth in detail the present andpreferred construction of the device, still in practice such deviationsfrom such detail may be resorted to as do not form a departure from thespirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful anddesire to secure by Letters Patent is:

1. A piston-ring peener including a peening disc, means for rotating thedisc, a mem ber. horizontally alined with the disc and spaced relativethereto to enable the width of a ring being received between the discand said member, pressure means acting to force the member toward thedisc to cause the ring to be frictionally engaged by the disc, and meansfor moving said member away from the ring at predetermined intervalsagainst the resistance offered by the pressure means.

2. A structure as in claim 1, with means for enabling the effectivenessof the pressure means to be altered at will.

3. A structure as in claim 1, with means for enabling the normal spacingof said member from the disc to be altered at will.

4. A piston-ring peener including a peening disc, means for rotating thedisc, a roller horizontally alined with the disc and spaced relativethereto to enable the width of a ring being received between the rollerand disc, a horizontally slidable support for the roller movableradially to and from the disc to press the ring against the disc, aspring acting on the support for forcing the same toward the disc, andmeans functioning with the rotation of the disc for moving the supportaway from the disc at recurrin intervals a distance sufficient to enablet e ring to be withdrawn.

5. A piston-ring peener including a peening disc, means for rotating thedisc, a roller horizontally alined with the disc and spaced relativethereto to enable the width of a ring being received between the rollerand disc, a horizontally slidable support for the roller movableradially to and from the disc, a spring acting on the support forforcing the same toward the disc, a rotatable cam disc, means connectingsaid cam with the support, means for rotating the cam, and a relativelyfixed member disposed to be engaged by the cam; the latter beingarranged relative to the support and member to cause the rotation of thecam to intermittently move said support against the resistance of thespring.

6. A piston-ring peener including a peening disc, a shaft for drivingthe same, a second shaft substantially parallel to said first namedshaft, a swivel support for one end of said second shaft, driveconnections between the shafts, a block through which said second shaftpasses, a swivel bearing connec- 5 tion between the blockand shaft, aroller mounted in the block in parallel and horizontal alinement withthe disc, and spaced therefrom a suflicient distance to enable the widthof a ring being received between said roller and disc, spring meansacting to force the block toward the disc radially thereof, and meansapplied to said second shaft for causing the block to be moved away fromthe disc at recurring intervals.

7. A pistomring peener including a peening disc, a shaft for driving thesame, a second shaft substantially parallel to said first named shaft, aswivel support for one end of said second shaft, drive connectionsbetween the shafts, a block through which said second shaft passes, aswivel bearing connection between the block and shaft, a roller mountedin the block in parallel and horizontal alinement with the disc, andspaced therefrom a sufficient distance to enable the width of a ringbeing received between said roller and disc, sprin means acting to forcethe block toward t e disc radially thereof, a cam-disc on the secondshaft, and a'relatively fixed member to be engaged by the disc during acertain portion of a revolution thereof and arranged to cause the secondshaft to swivel on its first named bearing and the block to be movedaway from the disc.

In testimony whereof I aflix m si ature.

JAMES S AW.

